507
Chapter 14
FCAN Interface Function
Preliminary User’s Manual U15839EE1V0UM00
Figure 14-42:
CAN 1 to 4 Synchronization Control Registers (C1SYNC to C4SYNC) (2/2)
Remarks: 1. CPU can read the CxSYNC register at any time (x = 1 to 4 for the derivatives
µPD703129(A) and µPD703129(A1), x = 1 to 2 for the derivative µPD703128(A)).
2. Writing to the register is only possible when the CAN module is set to INIT mode.
3. For setting the DBTR and SPTR bits some rules must be observed, otherwise the CAN
module will malfunction (for details refer to chapter 14.4 “Operating Considerations” on
page 509).
Bit Position
Bit Name
Function
4 to 0
DBTR4 to
DBTR0
Specifies the number of TQ per bit.
DBTR4 DBTR3 DBTR2 DBTR1 DBTR0
Data Bit Time
DBTR = (q + 1) TQ
q
0
0
0
0
0
Setting prohibited
–
·
·
·
0
0
1
0
1
0
0
1
1
1
8 TQ
7
0
1
0
0
0
9 TQ
8
0
1
0
0
1
10 TQ
9
·
·
·
·
·
·
·
1
1
0
0
0
25 TQ
24
Other than above
Setting prohibited
Содержание mPD703128
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